Quests are a gameplay feature introduced in The Dark Below. Originally, quests served as a form of story-based bounty. After patch 2.0.0, they now serve as the main vehicle for delivering story content in Destiny, guiding players through the main story campaign, as well as offering various sidequests related to subclasses or specific vendors. Each questline offers its own rewards. Any quest that is abandoned can be picked up at the Tower, at a kiosk within the Hall of Guardians. This includes any player who has already completed every story mission prior to patch 2.0.0 but hasn't tried the new quest system yet.